Azure API Policy Pax8 - Cache Auth Token

auzre-api-pax8-policy.xml

<cache-lookup-value key="@(" pax8bearerToken")" variable-name="pax8bearerToken" /><choose>
    <when condition="@(!context.Variables.ContainsKey(" pax8bearerToken"))">
        <send-request mode="new" response-variable-name="accessTokenResult" timeout="20" ignore-error="true">
            <set-url>https://login.pax8.com/oauth/token</set-url>
            <set-method>POST</set-method>
            <set-header name="Content-Type" exists-action="override">
                <value>application/json</value>
            </set-header>
            <set-body template="liquid">
                    {
                    "client_id": "{{Pax8-ClientID}}",
                    "client_secret": "{{Pax8-Secret}}",
                    "audience": "api://p8p.client",
                    "grant_type": "client_credentials"
                    }
            </set-body>
        </send-request>
        <set-variable name="accessToken" value="@(((IResponse)context.Variables[" accessTokenResult"]).Body.As<JObject>())" />
        <set-variable name="pax8bearerToken" value="@((string)((JObject)context.Variables[" accessToken"])[" access_token"])" />
        <set-variable name="tokenDurationSeconds" value="@((int)((JObject)context.Variables[" accessToken"])[" expires_in"])" />
        <cache-store-value key="pax8bearerToken" value="@((string)context.Variables[" pax8bearerToken"])" duration="@((int)context.Variables[" tokenDurationSeconds"])" />
    </when>
</choose>
<set-header name="Authorization" exists-action="override">
    <value>@("Bearer " + (string)context.Variables["pax8bearerToken"])</value>
</set-header>
<set-backend-service base-url="https://api.pax8.com/v1" />